題目：Accurate, Fast Dynamic Analysis of High-Speed Gear/Bearing Transmissions
時(shí)間：2025年5月28日 14:00-16:00
地點(diǎn)：機(jī)械與動力工程學(xué)院 F210會議室
邀請人：龍新華 研究員（振動、沖擊、噪聲研究所）
Biography
Prof. Parker is a Professor of Mechanical Engineering at the University of Utah. Previously, he was the L.S. Randolph Professor at Virginia Tech, an SJTU Distinguished Professor, Executive Dean at the Univ. of Michigan-Shanghai Jiao Tong Univ. Joint Institute, and a Professor at Ohio State University.
Prof. Parker's research examines vibration of high-speed mechanical systems. One focus has been gear transmission dynamics, with emphasis on developing advanced models. His research has been sponsored by numerous government agencies and companies in the aircraft engine, helicopter, automotive, wind turbine, and power generation industries.
Prof. Parker is co-Founder of RedPoint Vibration LLC. RedPoint has developed the most technically advanced finite element/multibody dynamics software for systems involving contact of high-precision elastic bodies (such as gears, bearings, and transmissions).
Prof. Parker is a Fellow of the American Society of Mechanical Engineers, the American Association for the Advancement of Science, and the International Institute for Acoustics and Vibration. He received the ASME Myklestad Award for “major innovation in vibration research and engineering.”
Abstract
In aerospace applications, electric vehicles, robots, and other systems, gears operate at much higher speeds than before and must be lightweight. Such gears experience greater vibration than conventional gears with more challenging behaviors: elastic deformation of the gears, resonance, Coriolis/centrifugal effects, nonlinearity, and parametric instability. Crack formation and surface damage must be avoided or reliably detected before failure (aerospace). Gears must be quiet (vehicles). New computational tools are needed. The seminar will present key ideas behind a finite element/multibody dynamics tool with high-precision contact modeling between elastic bodies. The formulation differs from existing software in: a) the accuracy of its contact model (for example, contact surfaces are modeled with tolerance less than 0.1 μm), b) its general multibody dynamics implementation, and c) computational efficiency that allows dynamic analysis of complete transmissions across a wide range of speeds. High-precision contact analysis is performed at each gear tooth and each bearing roller at every time step of the simulation. This avoids the large approximations of traditional models that use “mesh stiffness” to model gear contact. The software can analyze full transmissions with any type of gears and any type of bearings.
上海交大
機(jī)械動力學(xué)院
上海交大
機(jī)動本科教務(wù)辦
SJTU機(jī)動研教辦
上海交大
機(jī)動校友辦
上海交大MEM
SJTUME基礎(chǔ)實(shí)驗(yàn)與創(chuàng)新實(shí)踐
SJTUME錘錘
上海交大
機(jī)動研究生會
ME微紅旗
ME礪遠(yuǎn)學(xué)術(shù)
SJTUME職業(yè)發(fā)展中心
學(xué)院OA系統(tǒng)
jAccount登錄
ENGLISH
地址：上海市東川路800號上海交通大學(xué)閔行校區(qū)機(jī)械與動力工程學(xué)院
郵編：200240
Email：sjtume@sjtu.edu.cn